Worti-i



C. H. DUCKWORTH.

GROOVE FORMING MACHINE- APPLICATION FILED SEPT-6,1919.

1,438,754, Patented Dec. 12, 1922.

4 SHEETS-SHEET I.

INVENTOR ATTORNEY,

C. H. DUCKWORTH.

GROOVE FORMING MACHINE.

APPLlCATlON men SEPT-6,1919.

7 2. 2 H 9 m N U T R 2 m m m v M m m m u d w m m m a D1 r T R A \A n. l &

C. H. DUCKWORTH.

GROOVE FORMING MACHINE.

APPLICATION FI'LED SEPT- 6. 1919.

1,438,754, Patented Dec. 12,1922.

4 SHEETSSHEET 3- INVENTOR ATTORNEY C. H. DUCKWORTH.

GROOVE FORMING MACHINE.

APPLICATION FILED SEPT-6,1919- Patented Dec. 12, 1922.

4 SHEETS-SHEET 4.

4. R. m m

A TTORNEYS.

Patented Dec. l2, 1922; Y

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PATENT oF FIcE.

CLARENCE 1L nucizwon'ria, ont'nirnwoon orrro', ASSIG1\TOR T0 DOEHLER DIE I CASTING COMPANY, or nnoonrrrn, new "roan, A conronarroiv on NEW YORK.

GROOVE-FORMING MACHiNE.

Application filed September e, 1919. seri'aiive. 322,053.

To all whometmayconceim: v i Be it known that I, CLARnivonl-l. Doonwonri-r, a citizen of the United States,' residing at 1227 CookAve liakewood ()hio', have invented certain new and useful Improvements in Groove-Forming Machines of which the following is a specification. My inventionrelates to machines adapted to form grooves, such as oil grooves ot'desired curved or other configurations. -The machine is especially designed for the formation of such oil grooves on the inner surfaces of babbitt lined journal bearings which are curved to fitmthe shaft. in accordance with my improved device a rotating tool of the nature of a milling cutter is employed the work being 'reciprocated bacl; and forth beneath the same by suitable means, such asa handoperated traveling carriage. Provision is also made for moving the work transversely, during the reciprocation of the carriage, in accordance with the particular form of groove desired.

This is accomplished inthe preferred em bodiment of my device by mounting the work on a work-holder which is mounted on the carriage in such manner'asto be mov able transversely thereof,and causing a pin or like element secured to the work-holder to move in a slot on a templet, which slotis given the formof a desired groove tobe out, and so guides the work-holder in the necessary transverse movements. I Also, since the grooves are to be cut on the inner surface ofthe bearing, which is curvedupwardly, transversely of the direction of travel of the carriage, when the work is mounted on the work-holder it is necessary to preventthe grooves-being of uneven depth, when the worlnholder moves transversely. Thismay be accomplished bycausing the work-holder to move up ordown relative to the; groove torming'too] during the transverse movements of the worlc' holder, and in accordance with the curvature of the surface to be grooved. lhismay'be accomplished by supporting the work-holder above the carriage by pivotal links which oscillate in a vertical plane, the radius of the arcs through which these linksswing being the same or approximately the same i Fioasthe radius of curvature of the surface to be grooved; v

The object of my invention is to provide devices of the character described,v having varlous improved details of construction and comprising" various combinations of parts, all as will hereinafter be more particularly set forth and claimed .in the appended claims.

Inorder that my invention may be more clearly understood, attention is I hereby called to the accompanying drawings forming part of this application and illustrating one .embodlment of my invention. Referring to the drawings, 1 represents a side elevation of a machine comprising my invention; Fig. 2 is a horizontal section of the same taken on line 2-2 of Fig. 1; Fig. 3is a rear elevation .ofthe machine; Fig. i is apartial side elevation of the machine taken fromthe side opposite to that shown l, certain parts being shown in sec tion; Fig. 5 is a top plan viewof a bearing" provided with oil grooves by the machine; Fig. 6 is a sectional view taken on the line 66 of Fig. 2; and Fig. 7 is an enlarged viewin section of a detail of the construe tion and is taken on the line 7-7 of Fig. 2. Referring tothe drawings, the machine is provided with a frame or base casting 1 provided with a slideway 2 on which the car mage 3 1s mounted the carriage being held down on slideway 2 by means of guides 4, t,

which are held in sliding contact with the upper surfaces of'flanges 5, 5 on carriage 8", by means of bolts 6,6] The carriage may be reciprocated as desired longitudinally of slideway 2 by means'of the handle 7 which rotates-a shaft 8 which is provided with a gear, or toothedportion 9. i This latter meshes with a rack 10 suitably secured to carriage 8.21s bymeans of the bolt 11. I i

The tool carry-ingliead 12 is pivotally mounted on a shaft 13 carried by a pairof pedestals 14 secured to the base frame 1. The tool 15, which is inthe nature of a milling cutter adapted to cut oil grooves of the desired character; ls'su'itably secured in the forward end portion of thehea'd 12,in

during operation by means of a belt 16 which extends from a suitable source of power around sheave 17 mounted on shaft 18 in the head 12, thence around a sheave 19 which rotates with the tool 15, and thence around another sheave 17 on the shaft 18, and thence back to the source of power.

The tool holder or head 12 is provided with a downwardly extending tail piece 19 which engages against a screw 20 when the tool 15 is in its proper operating position. The screw 20 is threaded through a suitable opening in a bracket 21 extending upwardly from the base frame 1, the screw 20 being adjustable into correct position and secured in such position by a lock nut.

Provision should be made for locking the tool holder in its operative position. I accomplish this preferably by means of a to gle joint construction, which I will now describe. The head 12 is provided with a rearward extending bifurcated arm 22, through the two end portions of which extends a shaft 23. An arm 2 1 is pivotally mounted on this shaft, between the arms 22. Arm 24- extends upwardly and forwardly to the front of the machine to serve as a handle for lifting the tool holder and tool out of engagement with the work.

A bolt 25 extends upwardly through abracket 26 at the rear of frame 1 and is secured in adjusted position by a nut 27. A pin 28 extends through the head 29 of this bolt 25, and a pair of links 30, 30 are pivoted on pin 28 at both sides of head 29. The arm 2% is provided with a downwardly extending portion 2% which extends between the links 30, 30 and is pivotally secured thereto by a pin 31. A strap 32 is secured to the rear surfaces of links 30, 30, and carries a bolt 33, the forward end of which acts as a stop against which the rear surface of the lower portion of extension 2 1 of arm 24 is adapted to abut when tool 15 is in operative osition.

lVith this construction the tool 15, when in its working position, is locked against upward or downward movement by the toggle formedby links 30 and extension 24: which are in vertical alignment with each other when the tool is in operative position. To raise the tool, when it is desired to re move the work and substitute a different iece of work to be provided with grooves, it is only necessary to raise the handle 2 f, which breaks the toggle, moving extension at to the left, referring to Fig. 1, and accordingly swinging arms 22 downwardly and the forward portion of head 12 upwardly. I

The work-holder 3a is in the form of a cradle adapted to carry the work 35 which is represented as a semi-cylindrical learing' having fiai ges by which the bearing may be clamped to the work-holder. The manner portions 87 of the carriage on pins 40.

in which the work-holder is mounted on carriage 3 will now be described. The carriage is provided with a pair of upwardly extending portions 37, 37, which are shown as rounded at the top, and a pair of similar upwardly extending portions 38, 38, which are squared on the top. A pair of links 39, 239, are pivoted at their lower ends to the A similar pair of links 39 are pivoted on the opposite side of the work-holder, on the same pins ll) to the upwardly extending portions 38 of the carriage. Each of the links 39 and 39 is provided with an upwardly extending bolt carrying an extension l2 of the link, these extensions 41-2 be ing thus adjustable on bolts 11 so that the effective lengths of the links may be adjusted. The extensions 42 of the links are pivoted to the work-holder on pins as, 4:3.

It is advisable to provide mechanism whereby the links 39 and 89 may be aided in moving off their dead centers. Accordingly I have shown horizontal member d4: mounted on the squared tops of the upwardly extending portions 38 of the carriage. A gear a5 is mounted on a shaft 2L6 carried by member 14:, this gear being rotatable by means of a handle 47. Gears as and d9 are mounted on the )ivot i ins 10 of links 39 and 39' to rotate therewith. Gears 48 and 4L9 mesh with gear 15 so that swinging the handle results in the swinging of links 39 and 39 in a verti al plane transverse to the direction of travel of carriage 3, and a consequent swinging of the work-holder with a rising or falling of the work-holder the links move toward or away from their central vertical positions.

The templet 50 is secured on brackets 51. 51.. which may be secured beyond the opposite ends of carriage 3 in the desired adjusted positions by means of the bolts extending through vertical slots into base i. The templet 50 is provi led with a slot or slots 54 having the configuration which is desired for the oil grooves to be formed on the bearing or other object to be grooved. These grooves may be slightly curved or straight or of any desired configuration.

A pin 55 is secured centrally in the work holder to extend downwardly into the grooves 5%. It accordingly follows that as the carriage 3 is moved forwardly and back by means of handle 7, the pin 55 traveling in t 1e grooves 54 of the templet causes a move ment of the work-holder 34; transverse to the direction of travel of Carriage 3 as the slot 5% engaged by pin 55 moves away from the direction of travel of carriage3. Like wise, as the work-holder moves thus transversely it is lowered links 39 and 39 swing away from the hignest, central positions of their arcs. The radius of these arcs, that is, the distance between the centers of pins 40 and 43 maybe made the same-asthe radius of curvature of the 's'urfaceto' be grooved on the b'earing85. Accordinglythe work holder will be lowered in accordance with the "curvature of the surface to be grooved, so'that'the tool will out a groove of uniform depth on the curved: surface of bearing 35,. 3 Adjustment may be madefor different thickness of bearingstobe grooved byadjustment of bolts 41 carrying the upper extensions 42of the'links 39 and 139'.

Afinishedbearing is illustrated in Fig. 5 having the two oil grooves 56 formed therein in accordance with grooves oaof thetemplet.

It will be obvious thatthese grooves may be formed by reciprocating the carriage while the pin 55 travels infirst one and then the other of the branches of the grooves 54 in the templet, the curved portions 57 of grooves 56 being formed in accordance "With the form of the grooves 54 of the templet, the grooves 5th intersecting at their central-points so as to permit the pin 55 to cross over from one branch of the groove 54% to the other.

It will be obvious that my invention is not limited to the exact details of construction described, but is as broad as is indicated by the accompanying claims.

What I claim is 1. In a groove-forming machine,the combination of a base, a traveling carriage thereon, a templet secured to said base,a' workholder carried by said carriage, adapted to carry an upwardly-curved object to be grooved, means for causing said work-holder to move transversely to the direction of travel of said carriage, during said travel, in I accordance with the form of said templet, and means for causing said work-holder to move up or down in relation to said carriage, during its transverse movement,in accordance with the curvature of the surface to be grooved, so that the portion of said surface which is lowermost at any moment shall always be at the same height.

2. In a groove-forming machine, the comblnatlon of a traveling carriage, a workholder carried thereby, adapted to carry an object, the-surface of which to be grooved curves upwardly in a direction transverse to the direction of travel of said carr1age,means for causing said work-holder to move in transverse direct-ion, relative to said carriage,

during the travel of said carriage, in accord ance with the, desired shape of grooves to-be formed, and means for causing said workholder to move up or down, in relation to said carriage, during its transverse movement, so that the portion of the'surface to be shall always be at the same height. I

3. In a groove-forming machine, the combination of a traveling carriage, a-workholder carried thereby, adapted to carry an object, the surface of which to be grooved rooved which is lowermost at any moment curves upwardly in a direction transverse tothe dlIGOlllOIl" of travel of said carriage,

-means for causing said work-holder tomove in transverse direction, relative to said carriage, during the travel of said. carriage,

transversely to the direction of travel of said carriage.

5. In a groove-forming machine, the combination of a reciprocable carriage, a workholder adapted to carry an upwardly-curved object to be grooved, parallel links supporting said work-holder, pivoted at their lower ends to said carriage and at their upper ends to said work-holder, and'adapted to swing transversely to the direction of travel of said carriage, gears on said lower pivots for cscillating said links, and an intermediate gear, rotatably mounted on said carriage, for rotating said first named gears.

6. In a groove-forming machine, the combination of a reciprocable carriage, a workholder adapted to carry an upwardly-curved object to'be grooved, parallel links support-- ing said work-holder, pivoted at their lower ends to said carnage, and upper extensions on said links, pivoted to said work-holder and adjustable asto height in relation to the main portions of said links, said links being adapted to swing transversely to the direction of travel of said carriage.

7 In a groove-forming machine, the combination of a frame, means for supporting and rotating a groove-forming tool at a fixed position above the same, a work-holder adapted to carry an upwardly curved object to be grooved, a templet, and means for moving said work-holder in longitudinal and transverse directions, and in a verticalvdirection as it moves transversely, so as to cause the tool to form, grooves on the Work, of even depth, and in accordance with the shape of a desired pattern on said templet.

8. In a groove-forming machine, the combination of a frame, means for supporting and rotating. a groove-forming tool above the same, a work-holder adapted to carry an upwardly-curved object to be grooved, a

templet, and means for causing relative longitudinal and transverse movements between said work-holder and the tool, so as to cause the tool to form grooves on the work in 'accordance with the shape of a pattern on the templet, and for causing relative vertical movements between the work on said workholder and the tool, during such relative transverse movements, to cause such grooves as formed to be of even depth. 7

9. In a groove-forming machine, the combination of a frame, a tool-bearing head pivoted thereto having an angular extension, a link pivoted to said frame, and a member for raising said head, having a handle portion at one end, pivotally connected to the free end of said link adjacent its other end, and pivotally connected at a point intermediate its ends to said angular extension, said link and the portion of said member be tween the two pivoted connections thereof constituting a toggle joint adapted to lock said head in its operative position.

10. In a groove-forming machine, the combination of a frame, a tool-bearing head pivoted thereto, means for rotating the tool in said head, toggle means for locking said head in its operative position, and means ior simultaneously breaking the toggle and swinging the head to inoperative position.

This specification signed and witnessed this 10th day of July, 1919.

CLARENCE H. DUCKWORTH.

Witnesses:

WVM. M. DAVID, G. BOLLAM. 

